Crabgrass

are nonnative summer annual grasses that produce seed on long, slender branches, and have reddish or purple stems that are flat in cross-section.

Bull Thistle

is a biennial that is commonly found throughout the US. This weed can grow in a wide range of environments but prefers disturbed areas.

London Rocket

is a non-native winter annual mustard with bright or pale-yellow flowers and slender, green to brown seed pods that ascend up the flowering stems.

Russian Thistle

is a nonnative summer annual that is often known as tumbleweed.

Silverleaf Nightshade

is a native perennial herb or with star-shaped, purple flowers and small, orange fruit. Its stems are usually covered with short, yellow or red thorns.

Spotted Spurge

is a native creeping annual plant that has oval-shaped leaves and reddish stems that are filled with milky sap.